Pepto-Bismol regular strength liquid: 1 teaspoon per 5 pounds of body weight. So if your dog weighs 30 pounds, you'd give 6 teaspoons (or 2 tablespoons).
Regular strength tablets (often the form preferred by dogs): 1/4 tablet/20 pounds every 6-8 hours by mouth. (so if your dog weighs 40 pounds, they can have 1/2 a tablet)
Treatment should only be needed for 1-2 days. If diarrhea persists or worsens, contact your veterinarian.
I hope this helps!!
I would give her 1 capsule every 12 hours until her stools get more solid.
You can also try feeding her a mixture of boiled white rice and hamburger (3 parts rice to 1 part burger) which is a great diet for helping with gastrointestinal upset.